Wrong. The US Constitution doesn’t sanction or protect Free Trade with other nations in any way shape or form. It authorizes duties and tariffs on imports which is the opposite of Free Trade. The first law ever passed by the first congress was the tariff Act of 1789.
As I said, the Constitution authorizes but doesn't require the feds to regulate such. Thus outside constitutional federal law, EVERY US citizen, corporation or entity has the Constitutional right to free, unrestricted trade with any foreign country.
But nice try. Maybe you'll get it right one of these days.